These RJ45 port anti-dust plugs are made of high quality silicone.dust-proof and moisture-proof, waterproof and anti-oxidation, professional design, easy picking, close fit. | RJ45 dust caps prevents network errors and potential downtime caused by dust and debris in open slots. | These port anti-dust plugs are made of high quality silicone. They are durable and perfect for protecting ports from dust, liquid and oxidation rust, keep the ports clean and durable. | Solidly Built & Reusable. Softer elastic Silicone for snug fit.With a convenient outward facing pull-tab, these snap-in Ethernet port protectors are easy to insert & remove without disrupting adjacent ports or cables. | RJ45 dust plug is suitable for the RJ45 port of various equipment, such as HUB, SWITCH, router, computer, audio, etc.

Compatible with USB Female Ports The USB port dust covers are suitable for the ports of all machines with USB female posts, such as mobile phones, PC, AV equipment, etc. | USB Female Port Dust Covers，Overall Size : 13x 7.5x 6mm / 0.5 x 0.3 x 0.24 inches(L*W*H). | The USB dust plugs are made of high-grade durable and eco-friendly silicone material that can keep on your devices safe from lint, dust, and grime. | The USB cap port covers securely remain in place to suit even you move your devices, unlike other dust plugs that come loose whenever you move your laptop or get lost in your bag during that commute. | The USB dust plugs/stoppers are durable that no signs of wear and tear even with repeated use, no risk of melting, and damaging your ports in case your laptop overheats. And no loss of shape or fit even years down the line.